Top roll



L. D. COBB Aug. s, 1944.

TOP ROLL Filed Dec. 51, 1941 /NvENTo/Qs ELA/VD D. COBB.

Patented Aug. 8, 1.944

Leland D. Cobb,

Forestvlle; Conn., assigner to General Motors Corporation,` Detroit; Mich., a

corporation of Delaware Application December 31, 1941,s`e'rial No. 425,145

s claims. (c1. 1er-142).v

This invention relates to top rolls for textile machinery and particularly to top rolls for rov-v ing frames, spinning frames and similar devices wherein a roving, sliver,y thread or the like is subjected to an attenuating operation by passing it under tension between top and bottom rolls that are urged into peripheral rolling contact.

It is common practice to provide top rolls with reduced end portions which rotatably and frictionally engage within slots in a guiding frame while weighted arms frictionally engage these reduced end portions to urge the top rolls downwardly into supported rolling engagement with bottom rolls. A spinning or like machine has many top rolls, and the friction of these rolls against their guide frames and against the weighted arms causesobjectionable power loss as well as considerable wear which necessitates frequent replacement of worn parts.

An object of this invention is to provide an improved top roll of simple construction and which overcomes the above-noted objectionable features. proved top roll which embodies few parts and is so constructed that it does not rotatably engage' the guide slots and weighted arms. Another object is to provide a unit-handling top roll having a through shaft antifrictionally and demountably1 secured in a pair of interconnected top roll mem'- bers.

To these ends and also to improve generally upon devices of the character indicated, the invention consists in the vvarious matters hereinafter described and claimed.

In the accompanying drawing:

Figure 1 is a perspective View showing an appli-l cation of my invention;

Figure 2 is a` longitudinal section through one embodiment of my top roll; Y

Figure 3 is a longitudinal section through another embodiment of my top roll; and

Figures 4 and 5- are fragmentary longitudinal sections showing other embodiments of my top roll. Y

Generally stated, inthe illustrated embodiments, I have provided a unit-handling top roll,`

a's provided witha sleeve body, as I0, thatisrctatably mounted on an arbor or shaft, as

l2, through antifriction'bearings, as I4, and col-V lars, asr IB, demountably secured on the ends; ofv

Htaremspaced cots,, as I8 that. are .iperipherally A further object is to provide an im'l suitable weighting mechanism press downwardly on theseicollars i6 to yieldably urge the top roll unit T onto thebottom roll B so that sliver, thread or other suitable intermingled strips of fibers as indicated at S will be subjected to anv attenuating operation as it is fed between the top andbottom roll members.

Referring in detail to the embodiment of Figure 2, the sleeve body l 0 has enlarged cylindrical end portions forming spaced roll members Il interconnected by anintermediate necked portion of thevsleeve, and these end portions are covered by thevcots IB which maybe composed cf suitable yieldable material such as cork, leather or rubber. A central bore 22 through the sleeve body I Il opens at its ends `into counterbores 24 each of which is providedwith an annular shoulder 25 at its inner` end. Each bearing I4 is shown as a unitfhandling'antifriction bearing wherein rolling elements, such asbearing balls, roll in racewaysi formedin an Aouter race ring 26 and in an inner race ring 2.1, each` outer race ring 26 being frictionally .and demountably seated in one of the counterbores 24 against its end shoulder 25, and eachv inner race ring 26 slidably andv demountably receiving the arbor I2 which extends` through the bore 22 in spaced relation to thev sleeve I0. To assure. ample support for the arbor I2, I. preferably have the inner race rings 21 axially extenddlinwardly towards each other and beyond theouter race rings 26.

Each collar VI6 basan` outer''c'ylindrical end 3U that extends outwardly.v from the sleeve body Il) and which is loosely received in one of theA guide slots ilv as shown vin Fig. l. A peripheral grooveSI in each Icollar receives the end of one 'lar lies in closely spaced relation rto the counterborer24 Aand serves-,to prevent the egress of bearing lubricant out of the `ends of the top rolland also prevents `the ingress of dirt and other deleterious matter to the bearings. V'Io further vprevent leakage of .lubricant from the bearings I4, the space betweenl the outer ends of each of the race rings26 and 2l may be provided With annularshields indicated at 35.. The `bearings liaretlubricated before assemblyinmy i20p-r0.1!

structure and the end collars I6 secure the top roll parts as a unit-handling assembly. However, should the need arise for relubricatlon or replacement of these bearings itis only necessary to remove one of the set screws 32 whereupon the arbor may be withdrawn and the bearings I4 may then be slidably removed from the counterbores 24. The inner end of each collar I6 has a reduced annular shoulder 36 engageable with the adjacent inner race ring 2'I, and the collars I6 are so located by the set screws 32 that the space between the shoulders 36 slightly exceeds the distance between the corresponding outer t ends of the inner race rings 21 when the outer race rings 26 are both seated againstV the shoul-` ders 25.- may have sufficient axial movement so. that it may adjust itself to accommodate slight misalignment of parts, and there is no tendency for) the balls to bind in their raceways.

' Fig. 3 shows my invention embodying a unit- With this construction, each bearing ment, and means detachably fastening each of said collars to said shaft.

2. A top roll for textile machinery and comprising a rotatable sleeve body having end counterbores, spaced cots mounted on the sleeve body, a pair of unit-handling antifriction bearings, each bearing having an outer race ring demountably seated in one of said counterbores, inner race rings for said bearings, an arbor extending through said sleeve body and demountably supj1ported by said inner race rings in spaced relation to the sleeve body, a collar demountably fastened *to veach end of said arbor independently of said i bearings and extending into the sleeve body, and `shoulders on the inner ends of the collars respectively engageable with said inner race rings.

3. In a top roll for textile machinery, a rotat- `able sleeve body having a through bore, an antihandling needle bearing II4. `In this construction, a sleeve body |00 generally similar to my sleeve body I0 has end counterbores |24 terminating at their inner ends in shoulders |25.

Outer race rings |26 of these needle bearingsl I4 demountably seat within these counterbores against the shoulders |25, and rollers |21 rei tained within these outer race rings are in freely rolling contact with raceways |28 formed as integral reduced cylindrical projections from end collars ||6 corresponding to the collars I6 and secured upon the ends of an arbor I|2 by set screws |32. The intermediate portion of each end collar I I6 has a conical shoulder |36 engagefriction bearing demountably seated in each end of said bore, means locating said bearings, an arbor extending in spaced relation through said sleeve body and slidably received by both of said antifriction bearings, a collar on each end of said arbor and having a reduced annular shoulder laterally engageable with one of said antiiriction bearings, an intermediate peripheral flange on each collar in closely spaced relation to said bore, and means detachably fastening each of said collars in a predetermined position on said arbor.

4. In a top roll for textile machinery, a rotat- 'fjable sleeve body, unit-handling bearings de- .mountably received in the ends of said sleeve body, an arbor axially extending through said sleeve body in spaced relation, collars detachably secured to the ends of said arbor, and reduced cylindrical inner end portions on said collars respectively and demountably carried by said bearings.

5. In a top roll for textile machinery, a rotatable sleeve body having end counterbores, an

,Y arbor having an intermediate portion of enlarged diameter and end portions of reduced diameter, antifriction bearings demountably v `:seated in said counterbores and demountably re- I'I of the guide bracket G. Conical inner end shoulders 236 on the end collars 2|6 are engageable with the race rings |26 but initially spaced therefrom.

" Figure 5 shows my unit-handling top roll usingv sleeve bearings 3|4 which may be composed of suitable lubricant impregnated material, such for example, as a molded fibrous material commonly known under the trade name of Textolite and impregnated with graphite. The sleeve bearings 3|4 are respectively fitted in the end counterbores 324 and against the annular shoulders 325 in a sleeve body 3||J generally similar to the sleeve I0. The reduced outer ends 3I3 of an arbor 3|2 are journalled in the bearings 3I4, and end collars 3|6 similar to the collars 2|6 are demountably fastened by set screws 332 upon the reduced outer ends 3I3 of the arbor 3|2.

I claim: Y

' l. In a top roll for textile machinery, a rotat able sleeve body having end counterbores, spaced cots secured to said sleeve body, a 'unit-handling bearing demountably and non-rotatably seated in each counterbore, a shaft slidably received in' said bearings and spaced from said sleeve body, a collar on each end of said shaft and having an inner end projecting into said sleeve bodyY adja-` cent to one of said bearings, said collars being axially movable into and out of bearing engageceiving -the intermediate portion of said shaft,

and collars detachably fastened on the reduced end portions of the arbor, said collars projecting out from the ends of the sleeve body and co-operatively securing the antifriction bearings in seated position.

6. Ina top roll for textile machinery, a rotatable sleeve body having end counterbores, an arbor extending in spaced relation through said sleeve body and having reduced cylindrical ends, bearings demountably seated in said -counterbores and respectively receiving said reduced cylindrical ends, and collars detachably fastened to the reduced arbor ends and extending out of said sleeve body.

7. Ina top roll for textile machinery, a shaft,

" a weight receiving collar secured to each end of the shaft and detachable from the shaft by axially sliding thereon, an elongated sleeve body having spaced cots thereon, the interior of said body having a through bore surrounding and spaced from the shaft, a pair of bearings seated inthe bore near the ends of the bore and sur-` rounding said shaft to support the shaft and the body for relative rotation, each collar having a shoulder spaced from but engageable with the outer end of the adjacent bearing to limit .the extent of relative axial movement between Ithe bodyfand the shaft, and the shaft being remov-I able from said body and from both bearings :byy

y engagement.

slidably mounted in said bearings, and' collars detachably fastened to the ends ci? said shaft in axially spaced relation to said bearings and projecting out of the ends of said sleeve, said collars being axially movable into and l'out of bearing D. COBB. 

